Hey there, unfortunately the Aeros is not going to be able to reorganize songs by removing them and re-adding them.
We strongly discourage altering the Aeros files in any way, we only suggest copying the audio files from the SD to the computer for use in recording software. If you alter the SD files themselves, it could mess with how the Aeros is reading those files.
What you will likely want is MIDI song selection which is something many users are interested in, we do not have this up and running yet but we hope to get to this after the next 2 releases dealing with memory, 1 is coming out very soon!
Thanks for your question!